Sintering-machine.



S. P. C. BORSON.

SINTERING MACHINE.

APPLICATION FILED AuG.23. Isls.

m: Namws Pneus m.. nuoro uma. Insmm; nw. u. I:

S. P. C. BORSON.

SINTERING MACHINE.

APPLICATION FILED Aus.23, 1915.

Patented 06f. 3, 1916.

4 SHEETS-SHEET 2 INVENTOR.

WITNESSES:

mr mmms uns co., mmm-Ll ma wasnmclox. n c.

S. P. C. BORSON.

SNTERING MACHINE.

APPLICATIQN FILED AuG.23. 1915.

Pnted om. 3, 1916.

4 SHEETS-SHEET 3 IN VEN TOR.

mr mmm.: mens ca.. Maurad num wAsmNc mm. n, c.

NNY

S. P..C. BORSON.

SINTERING MACHINE.

APPLICATION man M1923, 1915.

Patented Oct. 3, 1916.

4 SHEETS-SHEET 4 IN V EN TOR. f

SCPI-IUS l?. C. BGRSON, 0F SALIDA., COLORADO.

sINTEniNe-MACHINE.

Specification of Letters Patent.

Patented oet. s, raie.

Application led August 23, 19115. Serial No. 46,959.

To all whom it may concern:

Be it known. that I, SoPHUs P. C.` BOR- soN, a citizen of the UnitedStates, residing at Salida, in the -county of Chaffee and State ofColora'dmhave invented a new and useful Sintering-Machine, of which thelfcllowing is a specification.

My invention relates to an improved sintering machine, or. furnace, inwhich a movable ore carrier operates in conjunction with a stationaryore retainer; and the objects of my invention are, first, to provide asolid or impervious bed member designed to prevent the leakage andescape of ore under treatment; second, to providea furnace in whichthere are no grates or perforated plates in the path of the hot,fumeladen gases, thus preventing the formation of fused deposits in theair passages; third, to provide cutters for automatically cutting thesintered ore into cakes of uniform size; fourth, to provide a furnaceequipped with means for self-ignitionv of the ore under treatment,thereby eliminating the expense of hand firing and the cost of fuel forigniting purposes; fifth, to provide a furnace in which the combustionsupporting air is delivered under pressure higher than the atmosphericand the products of combustion discharged directly into a flue orchimney leading to the atmosphere, thereby enabling me to use a smallpressure blower instead vof a large exhaust fan; sixth, to provide meansfor automatically prelieating the combustion supporting air, therebyfacili- 'tating combustion andV increasing the elficiency of thefurnace; and seventh, to reduce the cost of sintering ores by producinga. machine with few andy simple working parts, and having all itsworking surfaces faced with liners or wearing plates,

and which automatically performs a num-` A-A, Fig. 2; Fig. 2, is ahorizontal view,Y of the operating mechanism and its sup-jp..

ports as it would appear from above wit the furnace portion removed;`Fig. 3, is horizontal section ofuthe furnace taken ci the line B-B, Fig.1; Fig. 1l, is part elevation and part section taken approximately onthe line C-C, Fig. 1, showing the cutter construction; since the machineis symmetrical about its center line only one side has been shown inthis view; Fig. 5, is a vertical section of the cutter, its guides, andthel method of supporting the latter, taken cn' the line D D, Fig. a;Fig. 6, is a vertical section of the furnace, its supports, and airconductors, taken approximately on -the line E-E, Fig. 1; Figs. 7 and 8,are enlarged views of two types of sliding jointsy formed by the bottomand side members of the furnace; Fig. 9, is a vertical section of aspring, for tripping the detaching hooks 8'( and 88p; Fig. 10, is partsection and part elevation of the cutter operating mechanism, vtakenapproximately on the line F-F, Fig. 1; Fig.l V11, is a horizontal viewof -a modified operating mechanism as it would appear from above withthe furnace removed; Fig- 12, is a side elevation of the operatingmechanism taken on the line H-H, Fig. 11, with a portion of the framebroken away to show the gears and clutch shifter; Fig. 18, is a view inperspective showing the construction of the detaching hooks 87 and 88;Fig. 14, is a side elevation of the detaching hook 197, and the bracket200, with which it engages;

Fig. 15, is a vertical section of the furnace taken approximately on theline K-K, Fig.

3, the left half showing the construction of the igniter, and the righthalf the construction of the ore receiver.; Fig. 16, is a verticalsection of a modified construction of air conductors, takenapproximately on the line L-L, Fig-1, in a .direction opposite to thespurs orl arrows; Fig. 17, is an enlarged detail of the joint formed bythe side and end members of the ore receiver, taken on the line M-h/I,Fig. l; Fig. 18, is a vertical section through the igniter, taken on theline N-N, Fig. 3; Figs. 19 and 20, V

are vertical sections of a declutching mechanism, shown in differentpositions; Fig. 21, is a vertical section taken on the line P'-.P, Fig.20, with the cam 214i, removed; Fig. 22, is a section taken ong-the lineR-R, Fig. 11, showing the clutch shifter bracket 14.8; Fig.

.28, shows the construction of the bearing in the upper end of therocker arms 83 and 84;' Fig. 24, shows the joint formed by the rier;Fig. 25, is an enlarged view of a modilied type of sliding joint formedby the bottom and .side members of the furnace; Fig'.

links 113, and the rails 2, of the ore carllo 26, is a diagramillustrating the operation of the mechanism shown in Figs. 27 to 31,inclusive; Fig. 27 is a side elevation, partly in section, of a rockershaft and spring connecting rod forming part of the operating mechanismshown in Fig. 28; Fig. 28, is a horizontal view of a modified operatingmechanism as it would appear from above, with the furnace removed, thecenter line of the furnace coinciding with the center lines of the rods259 and 263; Fig. 29, is a side elevation, partly diagrammatic, of themechanism shown in Fig. 28; Fig. 30, is a detail of the rocker shaft236, and its arms; and Fig. 31, is a detail of the double link 246. InFigs. 2 and 11, the outline of the ore carrier is indicated by thebroken and dotted lines S, S.

My invention is composed of the following elements, which will bedescribed in the order named: first, ore carrying element; second, oreretaining element; third, supporting means; fourth, fume chamber; fifth,air conducting and air preheating means; sixth, ore igniting means;seventh, combustion producing means; eighth, sliding joint between orecarrying and ore retaining elements; ninth, ore carrier operating means;and tenth, cutters and cutter operating means.

vSimilar characters refer to similar parts throughout the several views.

The ore carrier consists of the bed plate 1, Figs. 1,4, e, 7, s, 1o, 12,15, '22, 24, 25 and 27, rigidly secured to and supported by rails orbeams 2, and preferably provided with a liner or face plate 3, bolted tothe bed plate 1, Figs. 7 and 8, and designed to protect the latter fromWear which would result from contact with the ore under treatment. Thebed plate 1, is preferably built up of uniform sections or units asshown in Figs. 1 and 3; the joints being indicated in Fig. 3, by thedotted transverse lines 4. The liner 3, is omitted in Fig. 1, but isshown in Fig. 3, in three sections, the joints being indicated by thefull transverse lines 5; it may, however, be 4constructed in anyconvenient number of sections greater or less than three, but to securerigidity the liner sections should break joint with the bed platesections, as indicated in Fig. 3.

The ore retaining element includes: an ore receiving section, an oreigniting section, a combustion section, and a discharge or cuttersection, each of which will be described separately.

The combustion section consists of the side walls 6, Figs. 1, 3, 6, 7and 8,. preferably faced with liners 7, bolted to the side walls 6,Figs. 7 and 8, and designed to protect the latter from wear which wouldresult from contact with the ore under treatment. The side wall 6, isconstructed with projecting end flanges 8, top flanges 9, and bottomflanges 10, constructed to form a series of air chambers or cells, ofwhich the wall 6, forms one side, and a cover plate or door 11, theother; the cover plates 11, may be made air tight by means of packingmaterial 12, Figs. 7 and 8, and are secured in position in anyconvenient manner. One type of fastener is shown in Fig. 7; it consistsof a slotted or forked lug 13, rigidly secured to the cover plate 11,and an eye bolt 14, secured to the flange 10, (or 9), by means of abracket 16, and provided with a nut 15. A sufiicient number of thesefasteners may be placed along top and bottom of the cover plates. Thecells or air chambers are made air tight except for the air inlets andoutlets to be hereinafter described. The combustion chamber formed bythe ore carrier and the side walls 6, is preferably composed of a numberof uniform sections or units, as shown in Figs. 1 and 3.

The ore igniting section consists of the side walls 17, Figs. 1, 3, 15and 18, which may be faced with liners 18, bolted to the side walls 17,and adapted to protect the d latter from wear which would result fromcontact with the ore under treatment. The `side walls 17, and liners 18,are provided with air passages 19, inclined backward, in-

ward, and downward, the outlet end communicating with the ignitingchamber,

formed by the ore carrier and the side walls 17, and the inlet endcommunicating with the air chamber formed by the end walls or iianges 8,top flange 9, bottom fiange 10, vcover plates 11, and the side walls 17;the covers 11, may be secured in place and made airtight in the mannershown in Fig. 7. Additional air passages 20, may be provided las shownin Figs. 1 and 3.

The ore receiving section, or ore receiver, consists of the side walls21, Figs. 1, 3 and 15, preferably faced with liners 22, and providedwith flanged ends 8; a front wall 23, rigidly secured to the side walls21, and provided with a flange 24; and a back wall 25, rigidly securedto the side walls 21. To `prevent leakageY of ore, two types of jointsare illustrated, either of which may be used. The rst consists of aslide 26, Figs. 1 and 3, secured to back wall 25, with bolts in slottedholes, permitting of vertical adjustment, and having near the bottomedge packing 27, rigidly secured to the slide 26, by a clamp 28.` Thesecond type of joint, Figs. 1, 3 and 17 consists of a plate 29, rigidlysecured to the bed plate 1, and provided with 1packing 27, and clamps28, similar to the packing and clamp above described, but placedvertically instead of horizontally.

The discharge or cutter section consists of side walls 30, Figs. 1, 3and 4, preferably l,faced with liners 31, and provided with end fianges8.

The individual sections of the ore retainer are rigidly secured tosupporting members 32, Figs. 1, 3 and 6, by means of bolts 33; and thesupporting members 32, are rigidly mounted on and secured to frame beams34, by means of bolts 35, Fig. 1.

The ore carrier and ore retainer are preferably erected at an angle withthe horizontal, in order to reduce the stresses in the operatingmechanism; the angle of inclination is determined by the angle of reposeof the-material to be treated; and the frame members 34, are preferablyerected parallel with the ore carrier and ore retainer, as shown inFig. 1. The frame beams 34, are rigidly mounted on footings or pedestals36, Fig. l., which may be constructed of inasonry, concrete, or metal;and the line T`-T, Fig. 1, may be taken to represent the top of afooting in which are embedded or supported the lower ends of the framebeams 34, and upon lwhich are mounted the pedestals 36, and othermachinery bases or supports to be hereinafter referred to. The orecarrier is supported on rollers or sectors 37, Figs. 1 and 6, groovedand flanged to receive the heads of the rails 2, and rigidly mounted onshafts 36, journaled in bearings 39, which are bolted to the supportingmembers 32.

A fume chamber having side walls 40, and top 41, Figs. 1, 6, and 16, andoutlet or flue connection 42, Fig. 1, is mounted directly above theigniting and combustion chambers, and rigidly secured thereto by meansof bolts; the joints may be made air tight by means of refractorypacking 43, Fig. 6. The walls 40, may be pierced by peep holes coveredby doors or plates 1, of transparent, or other material.

rThe air conducting and air preheating means consist of a header 44,Figs. 1 6 and 15, provided with distributing pipes 45, secured at oneend to the said header, and at the other end to the top wall 9, of theair chambers. Each distributing pipe is provided with a valve 46, bymeans of which the admission of air to the air chambers may beregulated. QA modified form of header 52, embodying my invention, isshown in transverse section in 16; the. longitudinal section beingsimilar in outline to the header 44, shown in Fig. 1. The bottom of theheader 52, is formed by the top sheet 41, of the fume chamber, to whichare secured side walls 48, and top wall 49; all joints being made airtight. Distributing pipes 45, may lead from the side of the header 52,or a modified form of distributing pipe may lead from the bottom of theheader and enter the fume chamber before connecting with the airchamber.. A baffle plate 50, Figs. 1 and 6, constructed of refractorymaterial, may be placed above a portion of the furnace to force thegases of combustion to travel through the ore in a longitudinaldirection, thereby reducing the amount of dust carried into the flue. Ablowerl connection 51, is shown in elevation in Fig. 1, and in sectionin Fig. 16. A. modified form of blgower connection 47, is shown in Figs.1 and 6. The blower connection 47, is best .adapted for use with theheader 44; while the blower connection 51, is best adapted for use withthe header 52.

The ore igniting means comprise the ieader 44, or 52, with its blowerconnection 47, or 51, distributing pipes 45, or 45, regulating valves46, the air chambers formed by the walls 8, 9, 10, 11 and .1.7, meansfor preventing the leakage of air, and the air passages 19 and 20.

rI he combustion producing means comprise the header 44, or 52, with itsblower connection 47, or 51, distributing pipes 45, or 45', regulatingvalves 46, the air chambers formed by the walls 6, 8, 9, 10 and 11,means for preventing the leakage of air, and the air passages 53, Figs.1, 7 and 8, connecting the said air chambers with the combustionchamber. Additional air passages 54, Figs. 3 and 6, may pierce the sidewalls 6, and liners 7. For convenience in illustrating, the passages 54,are shown in one side wall only; they may, however, be provided in bothside walls; and may or may not run` the entire length of the said sidewalls.

Air tight sliding joints are formed at the intersection of the orecarrier and ore retainer. As shown in Fig. 7, the joint is made airtight by a strip of refractory packing 55, which may, or may not, beflexible or elastic, and which extends from 4the head end of the machineto a point near the line (1M-C, Fig.l 1, at the discharge end. The saidpacking is provided with a flange 56, confined in a groove in the bedplate; and is secured in position by the liner 3, on one side, and bythe bracket 57, on the other. The bracket 57, extends the entire lengthof the packing 55, but is preferably made of several abutting sections;each section being secured in position by two or more cap screws orstuds 5S. Slotted holes 59, in the bracket 57, provide for lateraladjustment of the latter to compensate for wear and expansion. A slightclearance space 60, permits the liner 3, to expand laterally withoutdanger of cutting or crushing the packing A liner 61, rigidly secured bymeans of screws 62, to the projecting flange of the side wall, ispreferably provided to protect the latter fromv wear. A modiiied form ofsliding' joint embodying my invention is shown in Fig. 8. As shown here7the packing 63, is firmly clamped between the bracket 65, and the liner64, designed to protect the said packing from exposure to hightemperature and wear, by means of cap screws, studs, or bolts 66. Thefunctions of the slotted holes 59, cap screws or studs 58, and clearancespace 67, have been explained in connection with Fig. 7. A series offlexible springs 68, comparatively narrow in the direction perpendicularto the paper, may be provided to keep the packing in contact with theliner 61. The springs 68, are secured in position by cap screws or studs69, by means of which the tension in the said springs may also beregulated. The tvo types of joints are shown in Fig. 6, merely for thepurpose of illustration; in practice the machine will preferably beconstructed Vwith one type of rjoint only.

Another modification of an air tight sliding joint, embodying myinvention, is shown in Fig. 25. rlhe bottom liner is similar to theliner 3, hereinbefore described, eXcept that in this case it isconstructed with side flanges 272, adapted to protect the packing 270,from wear and high temperature. The bracket 271, lis similar to thebracket 57, hereinbefore described, except that the face in contact withthe packing is made to conform to the contour of the latter. The packingis preferably made of flexible, refractory material; it is provided witha flange 56, confined in a groove in the bed plate 1, and with a. headcontaining a tubular space 278, running the entire length of thepacking. Tie tube 273, may be made air tight, and Filled with air underpressure sul'licient to produce proper working contact between therubbing surfaces, consisting` of the packing and the liner 61. Or thesaid tube may be filled, or partly filled, with any other substanceadapted to createa pressure and to produce proper working contact of therubbing surfaces. 0r the walls of the said head may be made of materialsutliciently springy to produce the proper working contact of therubbing surfaces. The packing shown in F ig. 25, may also be used inFig. 8, in connection with the liner 611, bracket 75, and springs 68;when so used the flange 56, would be omitted.

r1`he ore carrier operating means consists of a mechanism adapted toproduce a comparathfely slow advance motion and a comparatively rapidreturn motion. In Fig. 2, the position of the ore carrier is indicatedin outline by the broken and dotted line S, S. ln the mechanism shown inF iOs. 1 and 2, a drive shaft 70, journaled in bearings 71, cv rries aspeed reducing gearing, which may consist of a worm 72, meshing with aworm gear 73, rigidly mounted on an eccentric shaft 7%, which isjournaled in bearings 75, supported by and bolted to the frame beams andin bearings 76, formed on the worm gear housing 77. A balance wheel orbelt pulley 78, is rigidly mounted on the drive shaft 70. Rigidlymounted on the shaft 74, are eccentrics 79 and 80, provided with ec-.Centric rods 8l, operatively connected by means of pins or bolts 82, torocker arms 83 and 84, which are rigidly mounted on rocker shafts 85,journaled in bearings 86. The upper end of rocker arms 83 and 84, carrydetaching hooks'87 and 88, adapted to engage and disengage lugs orbrackets 89 and 90, which will be described more fully hereinafter. Thehooks 87 and 88, are identical, and the description of one will coverboth. Referring to Fig. 13, the detaching hook is provided at one endwith a hardened steel block 91, secured in place by a screw 92, and atthe other end with two lugs 93, provided with holes 911, adapted toreceive a shaft 95, rigidly secured to the lugs 93, in any convenientmanner; as, for instance, by means of a pin 96, through each lug.Between the lugs 93, is formed a slot 97, adapted to receive the end ofthe rocker arm 83, or 84:), a detail of whichis shown in Fig. 28. Theshaft 95, carries at its ends rigidly secured release cams 98,preferably screwed on the shaft ends with right and left hand threadsrespectively, and locked by means of pins 99. At stated intervals thecams 98, engage releasing springs 100, shown in Figs. 1, 2 and 9. lThesesprings are provided with means for increasing or decreasing the springtension, thereby advancing or retarding the point of release. Anyconvenient type of adjustable spring may be used. One type is shown inFig. 9, which consists of the spring proper 101, confined in a housing102, one end of which is threaded and provided with an adjusting screw103, having at one end a key socket 104:, and at the other end a pin105, adapted to enter the coils of the spring. The other end of thehousing 102, is provided with a circular retaining liange 106, and formsa slide for a tappet, consisting of a pin 105, a cylindrical collar 107,and a hardened face 108. The housing 102, is mounted on a standardterminating in a base 109, provided with bolt holes 110. For conveniencein illustrating, the four Arelease springs 100, are shown mounteddirectly above theframe beams 341-; ,it is, however, preferable inpractice to construct and mount the springs nearer the center of themachine in order to have the shaft 95, as short as possible. The rapidreturn motion is produced by springs 111, Figs. 1 and 2, reacting onbell cranks 112, operatively connected through links 113, to the orecarrier. rThe springs are provided with any convenient form ofadjustment for varying the spring tension. In the arrangement shown, thespring seat 114, is secured to a threaded stem 115, extending through ahub 116, of the base or pedestal 117; an adjusting nut 118, serves toraise or lower the stem 115, and a loc-k nut 119, locks the said stem inplace after adjustment is made. The cap 120, is provided with two jaws121, spaced to forni a slot which serves as a guide for the lower end ofthe bell crank 112.

The upper end of the bell crank is operatively connected to two links113, by a bolt or pin 122; and the links 113, are operatively connectedto the ore carrier supporting rails 2, by a bolt or pin 123, Fig. 2 4,seated in two blocks 12,4, bolted to the'rails 2. The bell crank isprovided with a hub 125, rigidlv mounted on a shaft 126, journaled inbearings 127, bolted to and supported by the frame members 34. Two of'these springs and bell cranks are lillustrated, but the purpose of myinvention may be accomplished by using a greater or less number. To stopthe ore carrier, without shock, at a predetermined point, recoil springs12,8, Figs. 1 and 2, may be placed on and secured to the frame beams 34,and may be provided with adjustment and housings similar to those shownin Fig. 9. Recoil brackets 129, bolted to the ore zcarrier supportingrails 2v, and adapted to engage tappets 130, on the springs 128,transmit the reaction of thelatter to the ore carrier. The operatingmechanism aboye described will for convenience be referred to asoperating mechanism No. l.

A modified form of ore carrier operating mechanism embodying myinvention is shown in Figs. 11 and 12. The drive shaft 70, bearings 71and 7 6, worm 72, worm gear 7 3, worm gear housing 77 balance wheel orbelt pulley 78, and frame beams 34, are the Same as shown in Figs. 1 and2. F or the sake of clearness of illustration the ore carrier has beenomitted in F ig. 11, its position` being indicated in outline by thebroken and dotted lines S, S. Referring to Figs. 11 and 12, the wormgear 7 3, is rigidly mounted on clutch shaft ,carrying a reversingclutch. Any standard type of reversing clutch may be used, but for thesake of clearness of illustration a double jaw clutch is shown. ltcomprises the sleeve 131, slidably mounted on the end 132, of theclutchshaft, and compelled by means of a 'feather to rotate with thesame; the clutch 133, formed on the hub of a pinion 134, rotatablymounted on the shaft 132; and the clutch 135, rigidly mounted on the end136, of the clutch shaft. The end 132, of the clutch shaft is journaledin bearings 76; and the end 136, of the clutch shaft, in two bearings137, bolted to and supported by the frame beams 34. The two bearings 137are identical, and symmetrical with respect to their supports 34, andonly one is shown; the shaft being broken off near the face of theomitted bearing. A clutch shifter provided with forked ends 138 and 139,operatively connected tosleeves 131, and 140, respectively, is mountedby means of the hub 141, and pin 142, on supporting framework 143,supported on one side by the frame beams 34, and on the other by thefooting T T, Fig. 1.- A Shifter bar 144, slidably mounted in bearings145, and

provided with a rigidly attached sleeve 140, carries springs 146 and147, confined between the ends of a. shifter bracket 148, and collars149, secured to the bar 144, by set screws; the bracket 148, is boltedto the ore carrier by bolts 150, Figs. 11 and 22. The end 136, of theclutch shaft, carriesarigidly attached lever or crank 151, operativelyconnected by a bolt or pin 152, to links 153, which are operativelyconnected through a. bolt or pin 154, to a bracket 155, bolted to theore car` rier. Meshing with the pinion 134, is a gear 156, rigidlymounted on a shaft 157, journaled in bearings 158, supported by theframe members 34, and 143. The shaft 157, carries a. rigidly attachedlever or crank 159, operatively connected by a bolt or pin 160, to links161, which are operatively connected through a bolt or pin 162, to abracket 163, bolted to the ore carrier. rlhe operating mechanism shownand described in Figs. 11 and 12, will be referred to as operatingmechanism No. 2, and may be operated alone to advance and return the orecarrier, or it may be operated in conjunction with the rapid returnmotion and recoil mechanism 111 to 130, inclusive, Figs. 1 and 2.

Another modification of the ore carrier operating mechanism embodying myinvention is shown in Figs. 26, 27, 28, 29, 30 and 31. The drive shaft70, bearings 71, balance wheel or pulley 78, and speed reducing gearing72,73, 76 and 77, are the same as in Figs. 1, 2, 11 and 12. rigidlymounted on a shaft 232, journaled in bearings 76, on the gear 1n'ousing7 7, and in a bearing 2,33, bolted to the frame beams 34. A gear 234,rigidly Vmounted on the shaft 232, meshes with an idler 235, rotatablymounted on a rocker shaft 236, and confined between two collars 237,secured in position by set screws; or the said idler may be mounted byany means commonly em ployed for the purpose. The idler 235, meshes witha gear 238, rigidly mounted on a shaft 239, ournaled in bearings 240,bolted to the frame beams 34. To avoid crowding, the frame beams 34, arenot shown in Fig. 28; and the gears 234, 235, and 238, are indicated bytheir pitch lines in Fig. 29; the arrows indicating the respectivedirections of rotation. A crank 241, is rigidly mounted on the shaft232, and operatively connected by a bolt or pin 242, to a link 243. Acrank 244, is rigidly mounted on the shaft 239, and operativelyconnected by a bolt or pin 245, to a. double link 246, Fig. 31,constructed to form a slot 247, in which the link 243, is adapted tomove. The links 243, and 246, are operatively connected to a pin 248,rigidly mounted in and secured to a crosshead 249, adapted to slide inthe crosshead guide 250, formed in one end of a rocker arm 251, rigidlymounted on and secured lto the rocker shaft 236. The shaft 236, is jour-The worm wheel 73, is i the rocker shaft 236, is shown operativelyconnected with the ore carrier bed plate 1, through the bracket 256, anda spring connecting rod, which may be constructed in any convenientmanner.

in the present case, the spring connecting rod consists of a rod 259,operatively connected to the pin 258, and provided with a head 260,having holes adapted to receive the threaded rods 261, provided withadjusting nuts 262, by means of which the return stroke of the orecarrier may be regu-A lated. Uperatively connected to the pin 255, inlever 253, 1s a rod 263, slidably mounted in the spring 265, andprovided with a head l264, constructed to forni a seat for one end ofthe said spring 265, the other end of which reacts on a seat 266, havingan opening 267, through which the rod 263 moves, and provided with holesadapted to receive the rods 261. In Fig. 27, the spring details areshown partly in section in order to more clearly show the constructionthereof; and in Fig. 28, a portion of the spring details are broken awayto expose the mechanism below. The center line of the ore carrierpreferably coincides with the center lines of the connecting rods 259and 263, Fig. 28. The mechanismv described in connection with Figs. 26to 31, inclusive, will be referred to as operating mechanism No. 3.

Cutters and cutter operating means are shown in Figs. 1, 2, 3, 4, 5, 10and 14. The cutters consist of blades 164, bolted to blade holders 165,by bolts 166, and are slidably mounted in guides 167 and 168, bolted tothe side walls 30, by bolts 169, and to brackets 17 0, by bolts 171,Fig. 4. Blades 164, register with slots 172, through the side walls 30,and\ liners 31. Toggles, Figs. 2 and 4, are formed by links 173, andpins or bolts 174, 175 and 176. Shackles 177, are operatively connectedto the toggles by the pins 175, and to connecting rods 178, by pins orbolts 179. Relief springs may be providedto protect the cutters frominjury, and for this purpose any convenient form of adjustable springmay be used. In the type shown in Fig. 4, a lug 180, having a hole orbearing for the pin 176, is provided with a circular cap 181, slidablymounted in a cylindrical guide 182, and in contact with one end of acompression spring 183, the other end of which reacts on a cylindricalseat 184, provided with a threaded stem 185, carrying a lock nut 186;the guide 182, is provided with a circular flange or collar 187, adaptedto enga-ge and retain the cap 181, and is secured to the bracket 170, bykey 188, and bolts 189. The drive shaft 70, Figs. 1, 2, 11 and 28,carries a gear 190, meshing with a gear 191, rigidly mounted on theshaft 192, journaled in bearings 193, supported by and bolted to framebeams 34. Rigidly mounted on the ends of shaft 192, are crank disks 194,carrying crank pins 195, journaled in bearings 196,

in the connecting rods 178. For engaging and disengaging the cutteroperating mechanism a detaching hook 197, Figs. 1, 2, 10 and 14,operatively connected to a lever 198, by a bolt or pin 199, engages anddisengages a lug or bracket 200similar to brackets 89 and 90,hereinbefore mentioned. Fach bracket 89, 90 and 200, (see Figs. 10 and14), is provided with a hardened steel block 202, secured in place by ascrew 203, and is secured to the ore carrier by bolts 204. rIhedetaching hook 197, is provided at one end with a hardened steel. block205, secured in place by a screw 206, and at the other end with a hub207, forming a bearing 208, for the pin 199, and slotted to receive theend of the lever 198. The detaching hooks 87, 88 and 197, are held incontact with their respective brackets by springs 201, Figs. 1 and 10.One side of hub 207, is extended to form a lug 209, having a hole orbearing 210, adapted to receive a bolt or pin 211, mounted in one end ofa tappet rod 212, Figs. 1, 2 and 10, the other end of which is providedwith a Hanged head 213, one flange of which slides in a grooved guide,Figs. 1, 2, 19, 20 and 21, and the other flange of which is adapted toengage and disengage a tripping cam 214, Figs. 1, 2, 10, 19 and 20,rigidly and adjustably mounted on the shaft 192, and secured to thelatter by one or more set screws 215, Fig. 10, recessed into the hub216, of the said tripping cam. The lever 198, is rigidly mounted on aclutch shaft 217, Figs. 1, 2 and 10, journaled in bearings 218, boltedto frame beams 34, by bolts 219. The shaft 217, is held in lateraladjustment by collars 220, and carries at one end a rigidly attachedclutch shifter 221, provided with pins or rollers 222, adapted to engagea groove 223, in the hub of a clutch mounted on the drive shaft 70. Anystandard type of clutch may be used, but it must be provided with aspring 224, Figs. 1 and 2, or similar means for normally keeping theparts declutched. The guide, Figs. 1, 2, 19, 20 and 21, is formed withan inclined track or groove 225, flanked by side walls 226, having lugs227, with holes 228, adapted to receive rods 229, provided with clampingnuts 230, and secured to the webs of frame beams 34, by nuts 231.

A description ofthe operation of the machine follows; the direction ofthe discharge end being referred to as forward,

Ci Q

land the direction of lthe receiver vas backward:

Qpemtng mechanism No. 1.-Referring to Figs. 1 and 2, power is deliveredto the wheel or pulley 78; and the eccentric shaft 74, and theeccentrics rotated; the direction of rotation being immaterial. In thepositions shown, the eccentrics'are very nearly at the limits of theiroutward travel; detaching hook 87, engages bracket 89, but its springs100, are compressed and just on the point of releasing the hook, throughthe reaction of the said springs on the cams 98, Fig. 13. Hook 88, andits bracket 90, are seen to be separated by a space which is somewhat inexcess of the movement, or stroke, of the ore carrier; further rotationof the eccentric shaft will cause hook 87, to be depressed and released,and the ore carrier to be thrown back by the springs 111, cranks 112,and their attachments; the return movement being arrested, withoutshock, by the recoil mechanism 128, 129 and 130. The springs 111 and128, are adjusted so that the ore carrier stops before bracket 90,reaches hook 88. The detaching hook 197, and bracket 200, Fig. 1, areseen to be in contact, and continue so during the return movement of theore carrier; consequently, the hook 197, lever 198, tappet rod 212, andclutch shifter 221, Fig. 10, vibrate about the shaft 217; and the hangedhead 213, of the tappet rod, arrives in the position shown in Fig. 19,at the end of the return stroke of the ore carrier; the release cam 214,however, is still approximately in the position shown in Fig. 1. Themovement of clutch shifter 221, compresses spring 224, Figs. 1 and 2,and throws the clutch into contact; thereby'rotating gears 190 and 191,shaft 192, and crank pins 195; the latter operate the toggles, throughconecting rods 178. During the first half revolution of the shaft 192,the cam 214, rotates, in a clockwise direction, through an angle of 180degrees; the toggle pins 175, are moved back; and the blades 164 forcedinward; thereby bringing, or tending to bring, pins 174, 175 and 176,and blades 164, into a straight line, with the cutting edges of theblades 164, separated by a space the amount of which is to be determinedin operation; further rotation of the shaft 192, moves the toggle pins175, forward, and blades 164, outward; and by the time the said shafthas rotated through an angle of about 340 degrees the cam 214, hasreached the position shown in Fig. 19, and has engaged the flanged head213, of the tappet rod; further rotation of about 20 degrees brings thetappet rod and cam to the position shown in Fig. 20. This motion of thetappet rod 212, rotates hook 197, about pin 199, through lug 209,thereby disengaging bracket 200. The reaction of clutch spring 224,disengages the clutch, and forces the clutch shifter 221, and lever 198,back to their starting positions, thereby breaking the contact betweenrelease cam 214, and head 213, Fig. 20; and permitting the latter todrop down on its track out of reach of the said cam. rThe cutters,cutter operating mechanism, and cutter releasing mechanism have nowmoved through a complete cycle, and have returned to the positions shownin Figs. 1 and 2, except that hook 197, and bracket 200, are disengaged;their contact faces being separated by a space equal to the travel orstroke of the ore carrier; the contact faces of hook 87, and bracket 89,are separated by a similar space; and the working faces of hook 88, andbracket 90, are in contact. Both eccentrics have commenced their returnmovement; and a rotation of the eccentric shaft of about 180 degreesbrings the eccentrics to the limits of their inward travel; moves theore carrier to the limit of its forward travel, or stroke; andcompresses the release springs 100, sufficiently to break the contactbetween hook 88, and bracket 90.` The ore carrier is now thrown back bythe. rapid return mechanism and stopped by the recoil mechanism, and thecutters and their attachments moved through another cycle in the mannerpreviously described. The eccentrics are now commencing their outwardtravel with the hook 87, and bracket 89, in contact, and a rotation ofthe eccentric shaft of about 180 degrees brings all the operating partsinto the positions shown in Figs. 1 and 2. During the operationdescribed the cre carrier has made two slow forward movements, and tworapid return movements; the cutters land their attachments have operatedthrough two complete cycles; and the eccentrics and their attachmentsthrough one complete cycle. Further operation is a repetition of thatdescribed. Springs 183, and their cperating attachments, are providedfor the purpose of preventing injury to the cutters from excessivehardness of the sintered ore. Normally the reaction of the spring uponthe cap 181, keeps the latter in contact with the retainingcollar 187,during the entire cutting operation, and only abnormal pressure on theends of the cutter blades causes the spring to recoil.

l Operating mechanism No. Referring' to Figs. 11 and 12, power isdelivered to the wheel or pulley 78, and the shaft 132, rotated in aclockwise direction. 1n the position shown, the return stroke of the orecarrier is just commencing; the parts 132 and 136, of the clutch shaftare enga-ged through sleeve 131, and clutch 135; crank 151, is travelingin a clockwise direction, rapidly moving the ore carrier through itsreturn stroke; spring 147, is being compressed; and when, at the limitof the return travel of the ore carrier, the compression of the saidspring 147 is at its maXimum, it throws sleeve 131, out of contact withclutch 135, and into contact with clutch 133. At this point the cuttersoperate in the manner described in connection with operating mecahnismNo. 1. The pinion 134, now rotates clockwise with shaft 132, and beingin mesh with gear 156, rotates shaft 157, anti-clockwise, moving the orecarrier very slowly forward, and compressing spring 146. At the limit ofthe forward travel of the ore carrier, the compression of the spring146, is at its maximum, and it throws sleeve 131, out of contact withclutch 133, and into contact with clutch 135. One cycle has beencompleted and further operation is a repetition of that described.Springs 111, and cranks 112,. Figs. 1 and 2, and their attachments, mayoperate in conjunction with operating mechanism No. 2, to assist inreturning the ore carrier; or the said springs, cranks, and operatingattachments may be omitted.

Operating mechanism No. e3.Referring to Figs. 27 to 31, inclusive, poweris delivered to the wheel or pulley 7 8; and shaft 232, and crank 241,rotated in the direction of the arrows, Fig. 29. Through the gears 234,235 and 238, rotating in the directions indicated by the arrows, Fig.29, shaft 239, and crank 244, are rotated. rlhe motions of cranks 241and 244, are transmitted to rocker arm 251, through the links 243, and246, and their operating attachments; and the motion of rocker arm 251,is transmitted to the ore carrier through rocker shaft 236, arm 253,connecting rods 259 and 263, and their operating attachments. In Fig.26, the crank pin circles 263 and 269, are each divided into twelveequal arcs, representing respectively the positions of pins 242 and 245,during one cycle; and the intersecting arcs t to 7c, in the diagramabove, indicate the corresponding positions of the crosshead pin 248.Let it be assumed that pin 242, is at a, on circle 268, when pin 245, isat a, on circle 269, and pin 248, is at a., in the diagram above; andthat the pins 242 and 245 are rotating uniformly in the directions ofthe arrows, Fig. 26, covering the twelve spaces in twelve units of time.During the first unit of time pin 242, moves from a tol on circle 268;pin 245, moves from a to on circle 269;' and pin 248, from a to in thediagram above. During the second unit of time the said pins move from Z)to 0,' during the eleventh unit of time, the pins moves from 7a to Z;and during the twelfth unit of time from Z to a. It will thus be seenthat the forward movement of crosshead pin 248, is completed in tenunits of time, while its return movement is completed in` two units oftime. The pin 248, is shown in Figs. 27, 28 and 29, in a positioncorresponding to a, Fig. 26; and the head 264, of rod 263, is shownseparated from the head 260, of rod 259, by a space which it will beassumed for the purpose of illustration, is traveled by rod 263, in oneunit of time; so that when pin 248, reaches b, Fig. 26, head 264, willbe in contact with head 260, Fig. 27. During the first unit of time,while pin 248, advances from c to the ore carrier is therefore at rest,and it is during this interval that the cutters operate. The cutteroperating mechanism, and mode of operation have been described inconnection with operating mechanism No. 1, and the description neer. notbe repeated here. During the following nine units of time, pin 248,moves from to 7c, Fig. 26, and the ore carrier completes its advance, orforward, stroke. During the eleventh unit of time, pin 248, moves from7c to Z; spring 265, is being compressed, and the ore carrier isstationary. During the twelfth unit of time pin 248, moves from Z, toct; spring 265, recoils; and the entire return stroke of the ore carrieris completed. The spring 265, is so designed and adjusted that thereaction at the endL of the return stroke will bring the heads 260 and264, into the relative positions shown in Figs. 27 and 28. Fig. 26,represents a symmetrical or harmonic motion diagram; but it is evidentthat the motion may be made unsymmetrical by changing the length ofcrank 241, or 244, or of link 243, or 246; and that in fact an almostendless variety of motions may be produced by the mechanism illustrated,and without deviating from my invention.

Operation of fzLrmLcc.-liet it be assumed that the outlet 42, isconnected, in the ordinary manner, to a flue leading to stack orchimney, which lis capable of creating a draft, or reduction ofpressure, in the fume chamber 40; and that the discharge line from afan, blower, or other source of air supply, is attached to the blowerconnection 47, or 51. To start the furnace when empty, wood or otherkindling material is deposited in the bottom of the receiver andignited; and the receiver is then filled with ore on top of the burningkindling. The ore carrier operating mechanism is then started, and theore carrier set in motion through a cycle which, for the purpose ofillustration, may be assumed to consist of a forward motion of fourinches in about eighteen seconds, a return motion of four inches inabout one second, and a pause of about l one second, during which thecutter operating mechanism acts; the machine thus operates at the rateof three cycles per minute, and the ore advances at the rate of one footper minute. It is to be understood that the operating speeds, and therate of advance of the ore above specified, are for the purpose ofillustration only, and that I intend to adopt any operating speed, andany rate of advance, which the nature of the ore 'under treatmentdemands. During the slow for- .Ward movement of the ore carrier, thesuperincumbent ore is advanced with it in a compact mass; and during therapid return of .the ore carrier, the ore mass, owing to its inertia,remains practically undisturbed at the point to which it had beenadvanced. The only disturbance of the ore particles is a slightcompacting of the same, which, owing to its tendency to close upartificial channels in the ore mass, and to leave o-nly the naturalvoids between the ore particles for the passage of the ho-t gases ofcombustlon, may 'be considered to be highly beneiicial, since itprevents the hot gases from selecting paths of low resistance, andcompels the said gases to pass practically uniformly through every partof the ore mass. The valves 46, on the igniter distributing pipes, arenow opened, and the flame from the burning woodforced by the blast backinto the slowly advancing ore. The direction of the blast, see Figs. 3,15 and 18, is such that the bottom layer of ore will have the highertemperature; and the gases of combustion, following the path of leastresistance, escape in front of the flange 24, into the fume chamber, andthence into the flue land stack. The receiver is kept filled with orewhich may be supplied, either continuously or intermittently, in themanner commonly used for feeding ore, which usually includes some formof feed hopper. As the ore mass advances in the igniting chamber, theyflame generated in the burning ore is propagated back into the freshore entering the igniter, and the process of ignition thus maintained.automatically and without the .addition of fuel other th an thatcontained in the ore itself. The i-gnitedore, passing Vsuccessively theair passages 19 and 20., enters the combustion chamber, and as itarrives opposite each pair of air chambers the respective valves 46, areopened, ,and air for combustion admitted through the air passages 53,-(and 54,when the -machine is equipped with the' latter). As previouslystated, the bottom layer of ore in the igniting chamber will have thehigher temperature, and may 4be assumed to be red hot when entering thefirst section of the combustion chamber; here it encounters the-opposing currents of air issuing from the passages '53, on both sides,and the flame is propagated upward and brought into con- -Ltact withevery particle of :ore in the furnace. Where the air passages 54, areprovided in vthe walls of the combustion chamber .the process ofsintering or roasting is accelerated, and -a greater volume of orecanybe sintered per -unitof time in a. given size machine, than where `onlythe air passages 53, are provided. By the ltime the ladvancing .ore hasarrived vopposite the cutters9 :the latter begin cuttlng the Slnteredore into cakes of nearly uniform size, which then discharge over vthe-lower edge of the ore carrier into 'the apparatus commonly employed forguiding the sintered ore into cars. The furnace is now filled with ore,in

various stages of sintering, to about the level ofl baffle plate 50; theore level in the receiver is maintained approximately constant; and theore carrier and cutters are adjusted, by means of the variousadjustments illustrated, to operate in the desired manner. The air forcombustion is preferably ,delivered at a uniform pressure; and ispreheated to the desired temperature in its passage through the blowerconnection, header, distributing pipes and air chambers; and the valves46, are regulated to deliver the desired quantity of air to theirrespective air chambers. The baffle plate 50, whenV used, is intended toreduce the quanti-ty of dust carried by the gases o-f combustion intothe iue and stack. It is clear that with comparatively high blastpressure and a comparatively shallow bed of material having its topsurface exposed land in which reactions favorable to the formation ofdust are constantly taking place, considerable quantities of this dustmight be carried by the waste gases into the flue system. To

prevent such formation of dust the baffle 50,

is made to cover the greater portion of the furnace, thereby limiting.the surface area at which the gases of combustion may escape, andconfining the areas of exit to localities where the resultant highervelocities can produce no detrimental effect. A portion of the gases ofcombustion are permitted to escape aro-und the upper or back end of theplate, since the gases at this point do not carry dust in suspension;and the gases in 1 L the remaining portion of the furnace are compelledto pass through the ore to a point where the sintering process iscomplete, around lthe vlower end of the baffle plate, and into the fumechamber.

n the various types of sliding joints illustrated, the air passages 19and 53, are so disposed with respect to the packings 55, 68 and 2170,that the force of the blast keeps dust, grit, and particles of ore, awayfrom the said packing, and carries away heat from the metal parts inContact with the said packing, thereby preventing overheating andexcessive wear of the said packing.

The term ore, ,as used hereinbefore and hereinaftenis intended toinclude any line or coarse material in a condition adapting it toberoasted and sintered and containing, or having added, fuel elements'in sufficient quantity to commence and carry to completion thesintering and roasting process. Such `ore may consist of ysulfids ofcopper, lead, or iron; or it may consist of a -mixture of sulfide andnon-sulfids in such Yproportiene Suitcent Sulfur 0r other fuelcomponents are present for the purpose specified; or it may consist ofmaterial having no inherent combustible elements, to which has beenadded other material containing combustible elements sufficient for Ithe purpose specified.

i am aware that prior to my invention machines have been made having fortheir object the sintering of ores by inducing or forcing air through amoving or stationary mass of ore, land l, therefore, do not claim suchaction broadly. All such machines, however, are dependent for theiroperation upon continuous external ignition of some portion of the oreunder treatment, as, for instance, by means of oil, gas, or coalburners, all of which require fuel and attendance.

My invention includes a novel igniter arrangement by which ignition ofthe ore in the furnace is automatic, continuous, and entirelyindependent of external application of heat or fuel during the sinteringand roasting process.

Having described my invention, l1 claim:

l. In a machine for sintering and roasting ore, 'the combination with amovably supported ore carrier comprising an impervious bed member withprojecting joint members, of a fixed ore retainer comprising twooppositely disposed perforated side walls provided with dependingiianges adapted to combine with the said joint members to form slidingjoints, means attached to the said ore retainer for forcing a blast ofair through the material under treatment. means for supporting the saidore carrier and ore retainer, and operating means attached to the saidore carrier adapted to produce a comparatively slow forward motion and acomparatively rapid return motion thereof, substantially as shown anddescribed.

f2. ln a machine for sintering and roasting ore, the combination with amovably supported ore carrier comprising an impervious ore supportprovided with upwardly projecting joint members, of a fixed ore retainercomprising oppositely arranged perforated side walls provided withdownwardly projecting flanges adapted to engage the said joint members-to form sliding joints, means for supporting the said ore carrier andore retainer, and an operating mechanism attached to the said orecarrier and adapted to produce a variable reciprocating motion thereof,substantially as shown and described.

3. In a machine for sintering and roasting ore, in combination, aslidably supported ore carrier comprising an impervious ore supportprovided with longitudinal joint members, a rigidly supported oreretainer comprising two oppositely disposed perforated side walls havingdepending longv tudinal flanges arranged to form, in combination withthe said joint members, longitudinal sliding joints, packing materialarranged in the said sliding joints adapted to prevent leakage of airand ore therethrough, operating means attached to the said ore carrieradapted to produce a variable reciprocating motion thereof, a pair ofoppositely disposed ore cutters slidably mounted inv guides secured tothe machine and adapted to register with apertures in the said oreretainer, an actuating mechanism operatively connecting the said cutterswith power transmitting means, a supplemental mechanism adapted tointermittently engage and disengage the said cutter actuating mechanism,and means for depositing ore on the said ore carrier, substantially asshown and described.

et. In a machine for sintering and roasting` ore, air conducting meanscomprising` a header adapted to receive air for combustion from anexternal source, air distributing pipes communicating with the saidheader and with air chambers situated in the sides of the machine, andmeans for regulating and controlling the flow of air in the said airconducting means, substantially as shown and described.

5. In a machine for sintering and roasting ore, an ore ignition chamberhaving rigidly supported perforated side walls with air chamberssituated thereon and provided with depending longitudinal flanges,

a slidably supported impervious bottom member having projectinglongitudinal flanges adapted to engage the flanges on the said sidewalls to form sliding joints, actuating means operativelv connected tothe said bottom member and adapted to produce a variable reciprocatingmotion thereof, means for depositing ore on the said. bottom member, andmeans for supplying air to the saidV air chambers, substantially asshown and described. y

6. In a machine for sintering and roasting' ore, an ignitionchambercomprising a slidably supported impervious ore carrier providedwith operating means, a fixed ore retainer having its walls pierced toform a plurality of nozzle-like apertures and carrying on their exteriorsurfaces air chambers equipped with means for preventing leakage or airtherefrom, air conduits provided with regulating Valves attached to thesaid air `chambers and adapted to receive air from a source of supplyand to deliver the same under pressure into the said air chambers andthence in the form of ljets through the apertured ore retaining wallsinto the said ignition chamber, the said apertures being so constructedand directed that air for ignition is forced first through the burningore and thence into the adjacent raw ore at a temperature suiicentlyhigh to ignite ithe ,1.,

latter Without the external application Vof heat or fuel, sliding jointstructures arranged at the lines of juncture of the said ore carrier andore retainer, means for delivering ore into the said ignition chamber`and means for collecting and discharging the Waste gases generated inthe said ignition chamber, substantially as shown and described. Y

7. In a machine for sintering and roasting ore, an ignition chamberlhaving ore-retaining side Walls carrying on their exterior surfaces airchambers provided With means for receiving regulated quantities of airfrom an external source and adapted to preheat the same, the said sideWalls being pierced to form a plurality of air discharges adapted totransfer jets of air under pressure from the said air chambers into thesaid ignition chamber, the said air discharges being soconst'ructed anddirected that the air for ignition is forced first through the burningore and thence into the adjacent raw ore a-t a temperature sufcientlyhigh to propagate the ignition automatically, continuously and Withoutthe external application of heat or fuel, means for moving a continuouscharge of ore through the said ignition chamber and past the said airdischarges, means for preventing leakage of air and ore from the saidignition chamber, and means for collecting and discharging Waste gasestherefrom, substantially as shovvn and described.

8. In a machine for sintering and roasting ore, an ignition furnacecomprising 'a movably supported impervious ore carrier provided withoperating means, a fixed ore retainer with perforated Walls and airchambers thereon, sliding joint structures arranged at the lines -ofjuncture of the said ore carrier and ore retainer, air conducting andair preheating means mounted on the said furnace and adapted todischarge air into the said air chambers and thence inthe form of jetsthrough the -perforations in the said ore retaining Walls and into thesaid furnace, the said air jets being so directed that 'the air forcombustion is forced firs-t through the burning ore and thence into vtheadjacent raw ore at a temperature sufliciently high tc ignite the latterWithout the external application of heat or fuel, means for moving acontinuous charge of ore through the furnace and past the said airdelivering means in a manner to make the action o-f ignition automaticand continuous, and means for collecting and discharging the waste gasesgenerated in the said furnace, substantially as shown and described.

9. In a. machine for sintering and roasting ore, a combustion chambercomprising a. slidably supported impervious ore carrier provided withoperating means, a fixed ore retainer having its Walls pierced to form aplurality of nozzle-like apertures, each Wall carrying on its exteriorsurface a series of air chambers equipped with means for preventingleakage of air therefrom, air conduits provided with regulating valvesattached to the said air chambers and adapted to receive air from asource of supply and to deliver Asame underv pressure into the said. air`chambers and thence in the form of jets through the apertured oreretaining Walls into vthe said combustion chamber, the said aperturesbeing so constructed and directed that air lfor combustion is forcedfirst through the burning ore at the bottom of the combustion chamberand thence into the ore above, sliding join-t structures arranged at thelines of juncture of the said ore carrier and ore retainer, means fordelivering ore into the said combustion chamber, and means forcollecting and discharging the gases of combustion generated therein,substantially as shown and described.

l0. In a machine for sintering and roasting ore, in combination, afurnace with a fume chamber xed thereto, air conducting and preheatingmeans comprising a blower connection, a header communicating therewith,air chambers arranged on the side Walls of the said furnace, and airpipes provided with regulating valves leading from the said header tothe said air chambers, means for mounting the said blower connection andheader above the said furnace in contact With the Waste gases escapingtherefrom, means for transferring air from the said air chambers to thesaid furnace, means for delivering ore practically continuously into thesaid furnace and vpast the said air transferring means, means forautomatically propagating ignition andcombustion in the said furnacewithout external application of heat or fuel, and means for preventingleakage of air and ore from the said furnace, substantially as shown anddescribed.

1l. In a machine for sintering and roasting ore, a fpair of rigidlysupported apertured ore retaining members provided' on Vtheir exteriorsurfaces with a plurality of air chambers and arranged to form the sidewalls 4of a furnace comprising an ingnition chamber and a combustionchamber, a movably supported impervious ore carrying member operativelyconnected to an actuating mechanism and arranged to form the bottom ofthe said furnace, sliding joint structures arranged at the lines ofjuncture of the said ore retainer and ore carrier and adapted to preventleakage of air and ore from the said furnace, means for deliveringregulated quantities of air into the said air chambers and thencethrough the apertured ore retaining members into the said furnace, meansfor delivering ore into the said furnace, means arranged near thedischarge end of the said furnace adapted to automatically out theslntered ore, and means for collecting and discharging the gases ofcombustion generated in the said furnace, substantially as shown anddescribed.

12. In a machine for sintering and roasting ore, an ore retainercomprising oppositely disposed side walls constructed to form a furnacetherebetween, air chambers formed on the said side walls and providedwith means for preventing leakage of air therefrom, air inlets adaptedto admit air into the said air chambers, a plurality of air outletssituated in the said side Walls and adapted to transfer air 'forcombustion from the said air chambers to the said furnace, flangesprojecting from the said side walls and constructed toform slidingsurfaces .for air tight sliding joints, and means for supporting thesaid ore retainer, substantially as shown and described.

13. In a machine for sintering and roast# ing ore, a pair of oppositelydisposed cutters slidably mounted in suitable guides and adapted toadvance into the sintered ore and, after cutting the same, to return totheir respective starting positions, and means for operating the saidcutters at predetermined intervals, substantially as shown anddescribed.

14. In a machine tor sintering and roasting ore, a pair oi' oppositelydisposed cutters rigidly and detachably mounted in suitable holders andslidably mounted in' guides situated on the said machine, meansoperatively connecting the said cutter holders with an operatingmechanism for forcing the said cutters into the sintered ore and 'forwithdrawing the said cutters and returning them to their originalpositions, and shock absorbing means for protecting tne said cutters andcutter operating means from injury, substantially as shown anddescribed.

15. In a machine for sintering and roasting ore, an ore retainerprovided with an apertured cutter section, cutters slidably mounted insuitable guides and adapted to register with the apertures in the saidcut ter section, means operatively connecting the said cutters with anoperating mechanism adapted to advance and return the said cuttersthrough the said apertures, and supplemental means for engaging anddisengaging the said cutters and operating mechanism, substantially asshown and described.

16. In a machine for sintering and roasting ore, the combination with aslidably supported ore carrier, of an operating mechanism adapted toproduce a comparatively slow advance movement of the said ore carrierand a comparatively rapid return movement of the same, substantially asshown and described.

17. In a machine :tor sintering and roasting ore, the combination with amovably supported ore carrier, of an operating mechanism adapted tostart and stop the said ore carrier without shock and constructed toproduce a comparatively slow forward movement vand a comparatively rapidreturn movement of the said ore carrier, and means for regulating` andvarying the events in the cycle through which the said mechanismoperates, substantiallyl as shown and described.

18. In a machine for sintering and roasting ore, the combination with amovably supported ore carrier, of an operating mechanism adapted toadvance and return the said ore carrier, and supplemental meansconnected with the said operating mechanism Jfor intermittentlyoperating an ore cutting device, substantially as shown and described.

In testimony whereof I have signed my name in the presence of twosubscribing witnesses.

SOPHUS P. C. BORSON.

Witnesses U. M. BoRsoN, M. W. Mnanows.

Gopies of this patent may be obtained for five cents each, by addressing'che Commissioner of Patents. Washington, D. C.

